I've just switched from a GeForce 2MX to a Geforce 4 Ti4200 128 MEG. I use Windows 98SE and have 512 MEGs of RAM. I'm having some trouble with the AGP aperture size settings. I had mistakenly been informed that AGP aperature should be set to one half your Graphics Card memory. I now know this is not true and it should be set to half your RAM. My AGP size had been set to 32 MEGS with my previous card and when I installed the new card. When it is set to 256MEGS my display goes black and the computer stops booting. If I adjust the AGP aperature to any other size larger than 32 MEGS I can only display in 256 colors 640 X 480. Any ideas here? My card is running great BTW. My 3D Mark scores are right about where they should be. Just want to be sure I'm getting 100% Thanks for helping.